[gobject-introspection] scanner: Turn dead code into assertion

[Colin Walters <walters src gnome org>]

commit 09fe4ca9b3e816f87698761f4b66bc2d0c25e4e0
Author: Colin Walters <walters verbum org>
Date:   Fri Jul 6 11:22:08 2012 -0400

    scanner: Turn dead code into assertion
    
    https://bugzilla.gnome.org/show_bug.cgi?id=656445

 giscanner/transformer.py |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/giscanner/transformer.py b/giscanner/transformer.py
index 834fbac..cf284d8 100644
--- a/giscanner/transformer.py
+++ b/giscanner/transformer.py
@@ -420,8 +420,7 @@ raise ValueError."""
         return func
 
     def _create_source_type(self, source_type):
-        if source_type is None:
-            return 'None'
+        assert source_type is not None
         if source_type.type == CTYPE_VOID:
             value = 'void'
         elif source_type.type == CTYPE_BASIC_TYPE: